How
do you draw a reaction profile diagram that shows how the energy of
the reactants progresses into the energy of the products making
sure all key points of the diagram can be labeled. For example,
what the activation energy and overall reaction energy is. Please
provide 3 examples.
Then describe how catalysts lower the activation energy of a
reaction and how this effects the reaction rate.
Exothermic Vs. Endothermic Reaction
Reaction progress diagrams for single-step endothermic and
exothermic reactions.
a. Devise a general statement about the relationship between Ea
and the rate of a reaction.
b. Describe the effect of temperature on the energy of
collisions, and explain how this effect changes the rate of a
reaction.
c. State three things that resulted in an
increase in the rate of the reaction. For each of the three things,
explain at a molecular level what happens to...
The following reaction is exothermic:
2SO2(g) + O2(g)
<=> 2SO3(g)
a. What is the effect of increasing the
temperature of the reaction mixture?
b. What effect would an increase in pressure
have on the reaction mixture?
c. what effect would it have when SO3 is
removed from the reaction mixture?
HCN is produced commercially by the exothermic
reaction 2NH3(g) + 3O2(g) + 2CH4(g) → 2HCN(g) + 6H2O(g)The reaction is performed at 1000oC in the presence
of a catalyst. Is the high temperature being used to
speed up the reaction or instead to make the reaction more
favorable? Explain your choice. Look at the
signs of ∆H and ∆S for the reaction. For HCN(g)
ΔHf= 135
kJ/mole S= 202
J/mole.K
ΔGf= 125 kJ/mole
Draw a reaction coordinate for both an exothermic and an
endothermic reaction. Be sure to label the axes, the average
energies of the reactants and the products, then energy releasd or
absorbed, and the activation energy.
Solute Solubiltity
0 degrees C 50 degrees C 100 degrees C
lead (ii) bromide PbBr2 0.455 1.94 4.75
silver sulfate Ag2SO4 0.573 1.08 1.41
sodium chloride NaCl 35.7 37.0 39.8
silver nitrate AgNO3 122 455 952
cesium chloride CsCl 161.4 218.5 270.4
copper (ii)...
A student is studying a reaction between reactants A and B. the
reaction is second order with respect to A, but zero order with
respect to B. Explain in 5-6 sentences what this means.
If the Concetration of A is tripled what will the effect be on the
reaction rate?
If the concentration of B is increased 10 times, what will the
effect be on the reaction rate?
A student is studying a reaction between reactants A and B. the
reaction is second order with respect to A, but zero order with
respect to B. Explain in 5-6 sentences what this means.
If the Concetration of A is tripled what will the effect be on the
reaction rate?
If the concentration of B is increased 10 times, what will the
effect be on the reaction rate?
The reaction of the alloy with the acid is exothermic. If the
hydrogen gas released is warmer than the water temperature and you
use the incorrect low temperature, how would this effect your
calculated %Al result (high or low)?
Explain.
A student performs three runs of the experiment using pure
aluminum and determines an average NH2 of 0.01156 mol/g
and a standard deviation of 0.00001 mol/g. What do
these results tell you about the random and systematic errors
present in...
For the exothermic reaction below, currently at equilibrium,
indicate for every change whether the reaction will shift to the
right (making more products), backward (making more reactants), or
no change.
Cu(OH)2 (s) + 2 OH –
(aq) Cu(OH)4–2
(aq)
Adding more Cu(OH)2
Adding some NaOH
Adding some HNO3
Adding some NaNO3
Increasing the temperature of the reaction
Decreasing the volume by removing some solvent
Consider the following reaction:
2Mg(s)+O2(g)→2MgO(s)ΔH=−1204kJ
Part A
Is this reaction exothermic or endothermic?
exothermic
endothermic
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Part B
Calculate the amount of heat transferred when 3.56 g of
Mg(s) reacts at constant pressure.
ΔH =
kJ
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Part C
How many grams of MgO are produced during an enthalpy change of
-231 kJ ?
m =
g
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Part D
How many kilojoules of heat are absorbed when 40.7 g of
MgO(s) is...